Update CHANGELOG for version 3.28.3

Updated changelog for version 3.28.3 with UI/UX improvements and bug fixes.

Author: mrubens

CHANGELOG.md

@@ -1,10 +1,22 @@
 # Roo Code Changelog
 
-## 3.28.3
-
-### Patch Changes
-
-- ![3.28.3 Release - UI/UX Improvements and Bug Fixes](/releases/3.28.3-release.png)
+## [3.28.3] - 2025-09-16
+
+![3.28.3 Release - UI/UX Improvements and Bug Fixes](/releases/3.28.3-release.png)
+
+- Fix: Filter out Claude Code built-in tools (ExitPlanMode, BashOutput, KillBash) (#7817 by @juliettefournier-econ, PR by @roomote)
+- Replace + icon with edit icon for New Task button (#7941 by @hannesrudolph, PR by @roomote)
+- Fix: Corrected C# tree-sitter query (#5238 by @vadash, PR by @mubeen-zulfiqar)
+- Add keyboard shortcut for "Add to Context" action (#7907 by @hannesrudolph, PR by @roomote)
+- Fix: Context menu is obscured when edit message (#7759 by @mini2s, PR by @NaccOll)
+- Fix: Handle ByteString conversion errors in OpenAI embedders (#7959 by @PavelA85, PR by @daniel-lxs)
+- Add Z.ai coding plan support (thanks @daniel-lxs!)
+- Move slash commands to Settings tab with gear icon for discoverability (thanks @roomote!)
+- Reposition Add Image button inside ChatTextArea (thanks @roomote!)
+- Bring back a way to temporarily and globally pause auto-approve without losing your toggle state (thanks @brunobergher!)
+- Makes text area buttons appear only when there's text (thanks @brunobergher!)
+- CONTRIBUTING.md tweaks and issue template rewrite (thanks @hannesrudolph!)
+- Bump axios from 1.9.0 to 1.12.0 (thanks @dependabot!)
 
 ## [3.28.2] - 2025-09-14